Overview
EN ISO 5365:2024 (ISO 5365:2024) specifies a concise designation system for tooth developmental stages using a single-letter and single-number code to improve data entry and interoperability. The letter identifies the tooth part - C (crown), R (root) and A (apex) - and the number denotes the developmental stage for that part. The standard is intended for use with dental radiographic images and includes informative tables and drawings (Annex A) for single- and multi-rooted teeth.
Key topics and requirements
- Simple code structure: a human-readable letter–number format (e.g., C3, R2, A1) where:
- The letter represents the tooth part (crown, root, apex).
- The number represents the development stage of that part.
- Defined developmental stage descriptors: crown stages C0–C7, root stages R1–R5, apex stages A1–A2, with radiographic descriptions (e.g., enamel presence, pulp chamber visibility, root outline, apex closure).
- Normative references: integrates terminology and designation conventions from ISO 1942, ISO 20888, and uses tooth designation as outlined in ISO 3950.
- Use with radiography: assignment of stages is based on radiographic appearance; illustrative images in Annex A are informative to reduce ambiguity in stage attribution.
- Interoperability focus: coded nomenclature facilitates standardized data capture, exchange and aggregation across clinical systems and research datasets.
Applications and who should use it
EN ISO 5365:2024 is applicable where standardized reporting of tooth development is needed:
- Clinical dentistry - consistent staging in pediatric dentistry, orthodontics and treatment planning.
- Forensic odontology - dental age estimation and case documentation using radiographic staging.
- Dental radiology - standardized reporting of developmental findings from 2D images.
- Research & epidemiology - harmonized datasets for population studies on dental development and growth.
- Health IT & EHR vendors - implementing coded fields for tooth development to support data interoperability and analytics.
- Standards bodies and regulators - aligning national guidance and data collection protocols.
The standard aims to improve consistency, objectivity and accuracy of developmental stage attribution, reducing ambiguity from varied staging systems.
Related standards
- ISO 1942 - Dentistry - Vocabulary
- ISO 20888 - Dentistry - Vocabulary and designation system for forensic oro‑dental data
- ISO 3950 - Tooth designation (used for tooth identification within this standard)
Keywords: EN ISO 5365:2024, ISO 5365:2024, tooth developmental stages, tooth coding, dental radiography, dental age assessment, tooth designation system, dentistry standard, interoperability.